chore: remove badge

[JaeAeich]

Because some of the badges are stupid and clutter the readme, they might look cool but also pretencious.

security: bandit, what does this badge show us, that we use bandit for security? Should we be advertising all the deps that we and their pupose?

[uniqueg]

If you come up with a concrete suggestion of badges that you think are actually useful/informative and another list of badges that you would like to dump because they are just showy, I will be very happy to sign off on this :)